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💧 Freshwater 🌡️ Tropical

Heptapterus Qenqo

Heptapterus qenqo Aguilera, Mirande & Azpelicueta, 2011
Max Length
21.3 cm
Max Weight
-
Lifespan
-
Trophic Level
3.6
Depth
-
Climate
Tropical
Resilience
Low
Vulnerability
57.00/100
Typical Length
-
Depth Zone
pelagic

📖 Overview

This species inhabits well-oxygenated rivers and streams, with gravel substratum and moderate to rapid flowing waters. Individuals usually shelter under large rocks. Apparently solitary and only a few specimens are usually captured per collecting site .

Scientific Name
Heptapterus qenqo
Authority
Aguilera, Mirande & Azpelicueta, 2011
Habitat
Freshwater
Climate
Tropical
Body Shape
Elongated
Max Length
21.3 cm
Trophic Level
3.6
Resilience
Low
Vulnerability
57.00/100
Salinity
0–0.5 ppt

🐟 Physical Description

Dorsal soft rays (total): 6; Anal soft rays: 11 - 13; Vertebrae: 51 - 52. This species is distinguished by the following characters: a small serrae on the anterior proximal margin of first pectoral-fin ray; anal-fin rays iv-v, 11-13 (15-17 total); adipose-fin base relatively short (40.9-47.4% SL); small eyes (7.4-14.2% HL); adipose fin is confluent to caudal fin; maxillary barbel not reaching pectoral-fin base in adults and reaching or scarcely surpassing first pectoral-fin ray in small juveniles .: elongated; Cross section: oval.

🌀 Behaviour

Behavioural data for Heptapterus Qenqo is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

🐣 Oviparous
Spawning Season
spring
Spawn Location
Substrate
Fertilization
External

🌍 Habitat & Distribution

Freshwater; pelagic-neritic. Tropical South America: Argentina.

🌿 Ecology

Zone Preferences
💧 Freshwater 🐟 Pelagic
Trophic Level
3.6±0.4
🧍 Solitary

📐 Morphometrics

Length–Weight Relationship: W = 0.00813 × L2.97 (TL)
Max TL
21.3cm
Dorsal Rays
6
Anal Rays
12
Vertebrae
52

🌡️ Water Parameters & Tolerance

Salinity Range
0–0.5ppt

📊 Population Risk & Fisheries

Population Resilience
Low
Minimum doubling time
Fishing Vulnerability
57.00/100
High vulnerability
Trophic Level
3.6
Predator
Body Shape
Elongated
Climate Zone
Tropical
Described By
Aguilera, Mirande & Azpelicueta, 2011

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